Investigation of the northern limit of dugong habitat in the Tokara Islands and Amami-Oshima in the Ryukyu archipelago, Japan
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- Ogura Go
- Laboratory of Subtropical Zoology, Faculty of Agriculture, University of the Ryukyus
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- Hirayama Takuji
- Subtropical Field Science Center, Faculty of Agriculture, University of the Ryukyus
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- Sudo Kenji
- Laboratory of Subtropical Zoology, Faculty of Agriculture, University of the Ryukyus
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- Otaishi Noriyuki
- Laboratory of Ecology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University
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- Mukai Hiroshi
- Akkeshi Marine Station, Aquatic Research Station, Field Science Center for Northern Biosphere, Hokkaido University
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- Kawashima Yoshitsugu
- Laboratory of Subtropical Zoology, Faculty of Agriculture, University of the Ryukyus
Bibliographic Information
- Other Title
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- 琉球列島におけるジュゴンの分布北限に関する聞き取り調査
- リュウキュウ レットウ ニ オケル ジュゴン ノ ブンプ ホクゲン ニ カンスル キキトリ チョウサ
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Description
To ascertain the northern limit of dugong habitat, this study investigated the distribution of dugong and seagrass in the Tokara Islands (Nakanoshima and Takarajima) and Amami-Oshima, in the Ryukyu archipelago. No dugong habitat and seagrass was found in Nakanoshima and Takarajima. In view of the seashore landscapes of the Tokara Islands, dugong habitat was not established from Kuchinoshima to Takarajima. Four dugong sightings occurred at Kurosaki and Yanosaki, in Kasari Bay at Amami-Oshima. The fact that that witnesses were a fisherman and a diver adds credibility to the sightings. In addition, colonies of three species of seagrass (Halophila ovalis, Syringodium isoetifolium and Halodule uninervis) were observed in Kasari Bay, distributed over a large area of the bay. These findings suggest that dugong habitat is established around Kusari Bay, and therefore, that this bay is the northern limit of dugong habitat in the Ryukyu archipelago.
Journal
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- Wildlife Conservation Japan
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Wildlife Conservation Japan 9 (2), 49-58, 2005
Association of Wildlife and Human Society
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Details 詳細情報について
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- CRID
- 1390001205350391296
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- NII Article ID
- 110004850874
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- NII Book ID
- AA11473258
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- ISSN
- 24331252
- 13418777
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- NDL BIB ID
- 7792156
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL Search
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed